Brake mechanism



0. SMITH.

BRAKE MECHANISM.

APPLICATION FILED MAR. 28. l9l6.

Patented Fb. 10,1920.

Qwuenfoz OBERLIN SMITH, or BRIDVGETON', NEW, JERSEY.

BRAKE MECHA ISM.

Specification of Letters iatent. 1 I Patented 10, 1920, Originalapplication filed December 14, 1911,-serie1 No. 665,799. Divided at thisapplication filed Mar ch 28,1916. Serial No. 87,292.: I

To all whom it may concern:

Be it known that I, OBERLIN SMITHQa that it may be readily applied'toapower press, or any other machine requirlng a clutch and brake as apart of its organization, and in any position on the machine which maybe required in view of the location of the shaft whose revolution is tobe controlled and, such a mode of mounting or support thereof, as willassure readily and certainly the concentricity of those members thatmust be concentric. With these and other objects hereinafter set forth,in View; my invention consists in the mechanism constructedsubstantially as hereinafter specified and claimed.

In the accompanying drawings Figure 1 is an end elevation of a clutchand brake embodying my invention;

Fig. 2 is a side view of the same, partly in longitudinal section.

To illustrate an embodiment of my invention, I have selected an instanceof its application in which a constantly running band Wheel '10 is to beclutched and unclutched from a shaft 11 having a pinion 12 by whichpower is to be transmitted to the desired machinery, the inion beingpreferably, but not necessarily ormed by gear teeth out in anenlargement of the shaft. The clutch shaft 11 is j ournaled in two boxescarried by a bracket 13, that is provided with bolt holes for itsattachment to the press or machine frame; as all parts of the clutch andbrake mechanism are carried by this bracket, the structure is thus aself contained one, or a unit, and, therefore, can be carried in stockfor use on various machines without change.

The wheel 10 is journaled on the shaft 11 so as to turn freely thereon,and as illustrated in Fig. 2, it has the internal circumference of itsrim coned to be engaged by the coned periphery of wooden friction'blocks14, secured to a spider 1 5 which has a hubby which the spider ismounted upon the shaft 11, the spider having, as is usua L'anaxialmovement to carry its blocks or shoes into and out of frictional contactwiththc rim of the wheel 10. Pivotedto ears 16, on

a collar 17, which is secured to the clutchshaft by screws 18, are twobell-crank toggle levers 19,0ne arm of each of which is connected bylinks 20 to the clutch spider and.

PATENT: I E-i k another-arm of which is connected by links 21, to theend of a bar 22,forming a toggle beam that passes diametrically throughcoincidingslots in the clutch shaft and the spider hub. Besides beingthe means to rock the toggle levers,- as presently explained, the barorbeam 22,- connects the spider and shaft so that they cannot'independently rotate. The bar or beam 22,- is restrained-fromendwise movement, as well as guided in its movement axially of theclutch shaft, by pins or projections 23, that bear upon diametricallyopposite fiat surfaces on the shaft. When the toggle beam or bar 22, ismoved to rock the toggle levers to set the clutch, the

beam and the opposite links connected therewith will be brought intoalinement, and thus the clutch be locked in its set position, and, ofcourse, the clutching pressure increases as said parts move intoalinement. I

The bracket 13, carries a brake member in the form of a brake-spider 24,having like the fly wheel 10, a conical surface for em.

gagement by wooden blocks or shoes, 25, carried by the clutch spider onthe side opposite that having the clutch shoes so that alternately theclutch and brake areapplied, to

revolve and stop the clutch shaft, respectively. The brake spider ismade separately from the bracket 13, but it is bolted thereto, so as ineffect to be a part thereof, and to secure perfect alinement of thebrake spider, its surface and the seat on the bracket engaged by it, arecylindrically curved on an arc concentric with the clutch shaft axis.Were the engaging surfaces of brake spider and bracket fiat it will beseen that the spider could occupy but one position where it would beconcentric with the shaft axis and, therefore, very nice adjustmentwould be necessary to. secure such concentricity and a shift in theposition of the spider sidewise in either direction would destroy suchconcentricity. Obviously, no nice or close adjustment' is necessary whenthe engaging surfaces of spider and bracket are concentric with theshaft axis, because it is impossible by any sidewise displacement of thespider to destroy the concentricity of spider and axis. Moreover, thecurved contacting surfaces of spider and bracket 13 assure againstnonalinement of spider axis and shaft axis by, any vertical tilting ofthe imparted to said beam to actuate the clutch and brake shoes. At itsouter end the rod 27 has a collar 28, which is engaged by one end of a'lever 29, pivoted to an arm 30 on the brake spider, while at its otherend it has a ball and socket connection with one end of a rod-31, whoseother end is connected to suitable treadle, or lever operating means notnecessary to be described.

It will be seen that the complete organization, including the clutch andthe brake (with the exception of simple'treadle connections) is mountedupon the bracket 13, so that all that is necessary for the equipment ofa press or other machine with its power-controlling mechanism, is tosecure the bracket to the machine framework in the position required forthe delivery of power from the shaft 11 to the main shaft of-themachine, duly connecting it with a treadle if desired.

This application is a division of my application Serial Number 665,799,allowed February 19, 1916. r 1

. Iaving thus described my invention what I claim is.

The combination of a bracket, a shaft sup ported wholly by the bracket,a wheel loose on the shaft, a brake member alongside the Wheel, having acylindrically curved face engaging a correspondingly curved surface onthe bracket, the axis of the curve being concentricwith the shaft axis,a friction member connected with the shaft and movably mounted betweenwheel and brake member, having on one side a clutch element, and on theopposite side a brake element, and means to move said friction shaft.

In testimony that I claim the foregoing I have hereunto set my hand. V 1

OBERLIN SMITH.

" member along the

